Loudspeaker



FIG. 1 is a front perspective view of a loudspeaker as seen from the front, top, and side;

FIG. 2 is a back perspective view of a thereof, as seen from the back, top, and opposite side;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is an opposite side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The dotted line portions of the drawings represent environmental structure only and form no part of the claimed design. 

The ornamental design for a loudspeaker, substantially as shown and described. 